US2166226A

US2166226A - Method of producing stampings

Info

Publication number: US2166226A
Application number: US68173A
Authority: US
Inventors: Vehko James
Original assignee: Murray Corp
Current assignee: Murray Corp; Murray Corp of America
Priority date: 1936-03-11
Filing date: 1936-03-11
Publication date: 1939-07-18
Anticipated expiration: 1956-07-18

Description

July 18, 1939. J. VEHKO 2,166,226

METHOD OF PRODUC I NG STAMP I NGS Filed Maz-ch 11, 1936 3 Sheets-Sheet 1 I 42- INIVENTOR E 4. K

TTORNEYS.

July 18, 1939.

INVENTOR fines I e/Iia.

BY 'fsomzvs.

July 18, 1939. J. VEHKO 2,166,226

METHOD OF PRODUCING STAMPINGS Filed March 11, 1936 5 Sheets-Sheet 3 INVENTOR J'alrzes e&/?a.

ATTORNEY6.

Patented July 18, 1939 UNITED STATES PATENT OFFICE 2,188,226 METHOD OF PRODUCING STAMPINGS James Vehko, Detroit, Micln, assignor to The Murray Corporation of America, a corporation of Delaware Application March 11, 1936, Serial No. 68,113

Claims.

This invention relates to deep drawn sheet metal stampings. More particularly it relates to a novel method of forming deep drawn sheet metal stampings, in which certain novel method steps 5 contribute to provide an excess of metal at the deepest part of the draw.

While it will become clear from the following description that the specific embodiment of the invention illustrated in the accompanying drawings is directed specifically to a novel method of forming fenders for automotive vehicles which have a headlight housing formed as an integral part of the fender, the genericinventlve concept presented herein will find broad and practical utility in many and various fields.

The present day trend of automobile design has required the provision of automotive vehicle fenders with relatively wide skirt portions, necessitating an exceptionally deep draw in the formation of the tender. The present invention relates to a construction in which a fender requiring an exceptionally deep draw in the crown portion has an integrally formed headlight housing requiring a further drawing of the metal from which the fender is made.

It is a general object of the present invention to provide a method for forming automotive vehicle fenders having head lamp housings located in the crown portion thereof, and formed as an integral part of the fender construction.

The present invention contemplates the provision of a method oi forming fenders of this character, which method contemplates the utilization of certain novel method steps which provide an accumulation of excess metal from which the headlight housing may be formed after the fender has been stamped to the desired configuration.

The present invention contemplates the provision of a method in which a predetermined portion of the blank is substantially deformed in its central portion to provide an excess of metal in this area prior to the stamping of the fender. The fender is then stamped to form, at the same time retaining this deformed area in deformed condition, in order to maintain the desired excess of metal. After the fender has been stamped to final form, the headlight housing is stamped to form from the deformed portion of the blank, and it will be clear that the excess metal accumulated in this portion of the blank will be ample for the purpose of forming this headlight housing without subjecting the blank asa whole to unnecessary strain.

By way of modification. the present invention contemplates the formation of a fender stunping having an area in the crown portion thereof deformed prior to the formation of the body portion of the stamping to provide excess metal for the formation of a headlight housing. After the fender has been stamped to substantially its final form, the front portion of the fender is slotted. a strip of metal removed therefrom and the edges on either side of this slot are then drawn together to provide additional excess metal for the formation of the head lamp housing. 10 Many other and further objects and advantages of the present invention will become clearly apparent from the following specification when considered in connection with the accompanying drawings forming a part thereof.

In the drawings:

Figure 1 represents an automobile fender manufactured in accordance with the method of the present invention;

Figure 2 is a side eievational view with parts in go section, illustrating a pair of dies suitable for use in connection with the present method, showing the first operation in the formation of the improved fender construction.

Figure 3 is a vertical transverse sectional view taken substantially on the line I3 of Figure 2, illustrating the inter-engaging dies which serve to shape the body portion of the fender.

Figure 4 is a transverse sectional view taken substantially on the line 4-4 of Figure 2, illusso trating the auxiliary die sections, which are utilized for the purpose of deforming a portion of the blank prior to the formation of the fender.

Figure 5 is a vertical transverse sectional view similar to Figure 4, illustrating the dies completely engaged to form the body portion of the fender to shape.

Figure 6 is a transverse sectional view through the dies utilized for the purpose-of further deforming the deformed area of the fender to provide the required metal for the formation of the head lamp housing.

Figure 7 is a transverse sectional view, similar to Figure 6, illustrating the dies utilized for providing the final forming operation of the head 5 lamp housing.

Figure B is a longitudinal sectional, view taken substantially on the line H of Figure 7 with parts broken away illustrating the shape of the dies utilized in the final forming operation of the so head lamp housing.

Figure 9 is a side perspective view of the completed fender construction after the headlight housing has been punched to provide the necessary. frontal opening therein.

Figure is a perspective view of a fender blank in which novel and different means are utilized in addition to those shown in the previous figures for providing excess metal for forming the headlight housing.

Figure 11 illustrates a completely formed fender manufactured in accordance with this modified form of the invention.

Figure 12 shows the fender construction illustrated in Figures 10 and 11 after the decorative trim has been applied to the headlight housing.

Figure 13 illustrates a partially formed blank embodying a still further modified form of the invention.

Figure 14 illustrates in perspective the completely formed fender manufactured from the partially formed blank shown in Figure 13.

Figure 15 illustrates in perspective the fender construction shown in Figure 14 with the decorative trim material applied thereto.

Figure 16 is an enlarged transverse sectional view taken substantially on the line iG-ili of Figure 15 illustrating in detail the joint interconnecting the front portions of the fender.

Figure 17 illustrates in perspective a still further modified form of the invention utilizing substantially the same steps of manufacture as the modified form of the invention shown in Figure 13.

Figure 18 is an enlarged transverse sectional view taken substantially on the line i8lii of Figure 17 illustrating the modified form of Joint interconnecting the front portions of the fender.

With more particular reference to the drawings and specifically to the form of the invention illustrated in Figures 1 to 9, inclusive, it will be seen that the improved fender construction is formed from a blank ill of sheet metal of suitable gauge which is placed in a suitable stationary die If having a configuration substantially that of the fender which it is desired to produce. This die member II has a movable die section in the central portion thereof which, as will hereinafter be seen, is adapted to preliminarily preform the blank III to provide excess metal for the subsequent formation of the headlight housing. This auxiliary die I2 is actuated by means of a vertically movable push rod II from a suitable hydraulic cylinder such as is conventional in die structures of this kind. The ram ii of the die press has secured thereto a die It which has a central portion il adapted to mate with the face of the auxiliary die I! and gather excess metal to be utilized, as subsequently explained, in the formation of the integrally formed headlight housing in the fender.

The remainder of the die i6 is of a configuration adapted to mate with the die ii and form the body portion of the fender.

In operation of the press, the blank III of suitable sheet metal is placed on the die if and the auxiliary die I2 is moved upwardly to meet the downwardly moving die l8, in order to deform and gather a substantial amount of metal in the central portion of the blank prior to final forming of the body portion of the fender as a whole. It will be seen by reference to Figure 2 that the auxiliary die I! meets and mates with the central portion of the downwardly moving die l8 prior to the interengagement of the dies i6 and H. These dies serve to corrugate or otherwise deform the central portion of the blank prior to the formation of the body portion of the fender. It will be seen by reference to Figure 2 that as the die I moves downwardly to the point where it messes has completed the deforming operation of the central portion of the blank, a bracket Ill serves to engage a push rod 2i actuating a valve 22, which serves to relieve fluid pressure from the hydraulic cylinder operating the push rod l3 and die II, in order to permit this auxiliary die to move downwardly with the die l8 during the final forming operation of the body portion of the fender. The manner in which the body portion of the fender is completely formed and the dies in their final position of this forming operation are clearly seen in the sectional view Figure 5.

After the completion of this operation, the blank I0 is removed and placed between a second pair of dies and 28, which serve to retain the body portion of the fender in its predetermined formed condition during a subsequent deforming operation of the central portion thereof. The die 25 has mounted therein an independently movable auxiliary die 21 which serves to mate with a recess 28 of suitable configuration in the central portion of the upper die 28. Movement of this auxiliary die 21 into engagement with the recess 28 serves to deform the central portion of the blank Ill and draw the metal thereof upwardly at the sides of the headlight housing and it will be clearly seen by reference to Figure 6 that during this operation the dies 25 and it serve to retain the body portion of the fender in substantially predetermined configuration.

After completion of this deforming operation. the blank is removed from the dies 25 and 28 and placed in a separate set of

dies

30 and 3|. The die 30 has an independently movable member 32 in its central portion, which mates with a suitable recess 33 in the central portion of the die 3|. The dies fl and 30 are of a configuration such that they serve to retain the'body portion of the fender in its finally finished configuration during the formation of the central portion thereof to the finally desired form. It will be seen by reference to Figures 7 and 8 that the die 32 and recess 33 in the die 3| with which it mates are of such configuration that they serve to shape the central portion of the blank ill to provide an upralsed headlight housing in the central portion of the tender of predetermined desired configuration.

After the completion of this operation, a suitable circular frontal opening may be punched in the headlight housing and the marginal edges of the blank trimmed to provide a fender substantially of the construction illustrated in Figure 9.

It will be appreciated from the foregoing that the method disclosed above serves to accumulate a rather substantial amount of metal in the central portion of the blank and retain this metal in predetermined form during the drawing of the body portion of the fender. After the body portion of the fender has been formed, the body portion thereof is clamped between dies to retain it in predetermined form during the formation of the headlight housing in the central portion thereof. It will be appreciated that the excess metal accumulated in the central portion of the fender serves to provide material from which the headlight housing may be subsequently formed without subjecting the body portion of the fender to strain during this last forming operation.

It has been found that the above outlined method provides a fender construction with a headlight housing therein in which the thickness and strength characteristics of the resultant product are substantially uniform throughout, ir-

respective of the fact that the draw as a whole is a relatively deep one.

In the modified form of the invention illustrated in Figures to 12, inclusive, it will be appreciated that additional means are provided for making available excess metal from which the headlight housing in the central portion of the fender construction may be formed. In this form of the invention, a blank 35 has the ntral portion 36 thereof deformed substantiallias has been described above prior to the dr g of the body portion of the fender to the desired final configuration. As has been described above, this central portion 8' is retained in deformed condition during the formation of the body portion of the fender as a whole to make available excess metal for the formation of the headlight housing in the manner hereinafter described.

In this form of the method of the present invention, prior to the further deformation of the central portion 38 of the blank, a suitable hole 11 is formed therein and at the same tifne a forwardly extending V-shaped slot II is formed, the mouth of which slot communicates with the hole 31. The blank is then placed in suitable dies which shape the central portion 3B of the blank to provide the headlight housing 39 in substantially final form and during which forming operation the metal is drawn inwardly from the sides in such a manner that the V-shaped slot 38 is closed and the edges thereof brought into substantially abutting relation as is shown in Figure ll. This drawing in of the metal from the sides, which results in the closing of the V-shaped slot ll, serves to make available additio al metal for the formation of the head lamp housing 39 and contributes with the excess'metal pr ded in the deformed portion 38 of the blank to provide suflicient metal for the headlight ho as a whole. It' will be appreciated that in this form of the invention sufficient excess metal is made available due to the drawing in from the sides to eliminate the second deforming operation shown in Figure 6 in connection with the preferred embodiment of the invention, if desired.

After the fender construction has been stamped to form substantially as is shown in Figure 11. a finish moulding I may be applied to the face of the opening in the headlight housing, and as seen in Figure 12 this finish mouldingmay be provided with a forwardly projecting ornamental portion ll which serves to cover and hide the slot 3| extending forwardly from the headlight opening.

In the modified form of the invention illustrated in Figures 13 to 16, inclusive, it will be appreciated that many' of the advantages and steps of the methods described above are utilized therein. In this form of the invention, a blank 15 firsthas the central portions It thereof deformed to provide excess metal for'the formation of the headlight housing; Subsequently this blank is shaped to provide a fender construction in which the forward portion thereof comprises two sections 41 and II, which have a strip of waste'metai there-i between. A suitable hole I! is cut in the deformed portion 4; of the blank and the waste metal between the sections 41 and ll of thefront portion of the fender is removed to provide a forwardly extending slot ill, which communicates with the openings 40. The blank is then placed in suitable dies which serve to shape the central portion 48 thereoftofinalformandatthesame'timemove the side portions l1 and towards each other to arrange their edges in substantially overlapping relation. It will be seen that this movement of the sections 41 and I) toward each other serves to make excess metal available for the formation of the headlight housing in the central portion of the blank. The adjacent edges of the sections 51 and 48 may be spot welded orotherwise secured together and the fender structure as a whole is finished by the application of a suitable moulding 52 which has formed as an integral part thereof a forwardly extending strip I! which serves to hide the seam joining the sections l1 and I! in the front portion of the fender.

In the modified form of the invention illustrated in Figures 17 and 18, substantially the same method steps are followed as has been described in the modified form of the method shown in Figures 13 to 16, inclusive. However. in this form of the invention, the final operation which serves to form the headlight housing also serves to move the sections 41 and II of the front portion of the fender into abutting relation and these two edges may be butt welded together and dressed down in order to provide an invisible seam I! therebetween, thus eliminating the necessity of the type of finish moulding illustrated in Figure 15. It will be appreciated that in this form of the invention, the finally completed fender construction will have an exterior appearance substantially as is shown in Figure 1.

From the foregoing it will be appreciated that the above described method is merely illustrative of the generic inventive concept presented in this application and that many other and further modifications thereof falling within the scope of the invention as defined in the appended claims will be clearly apparent to those skilled in the art.

What is claimed is:

l. The method of forming a vehicle fender and headlight housing from an integral sheet metal blank which includes deforming a portion of said blank, stamping the remainder of said blank to form the fender, the while retaining said deformed portion in deformed condition, and subsequently stamping said deformed portion to p vide a headlight housing.

2. The method of forming a vehicle fender and'headlight housing from an integraisheet metal blank which includes deforming a portion of said blank, stamping -the remainder of said blank to form the fender, the while retaining said deformed portion in deformed condition, and subsequently stamping said deformed portion to provide a headlight housing the while retaining the body portion of said blank in substantially final configuration.

3. The method of forming a deep drawn sheet metal stamping which comprises gathering a portion thereof to provide excess metal therein, stamping the remainder of said blank to final form, the while retaining said gathered portion in deformed condition, and subsequently stamping said gathered portion to final form, at the same time retaining the remainder of the blank in formed condition.

4. The method of forming a vehicle fender and headlight housing from an integral sheet metal blank which includes deforming a portion of said blank, stamping the fender to final form the while retaining saiddeformed portion in deformed condition, further deforming the deformed portion of the blank the while retaining the fender in formed condition and finally forming said deformed portion to provide a headlight housing.

5. The method of forming a vehicle fender and headlight housing from an integral sheet metal blank which includes gathering a portion of said blank to provide excess metal for the headlight housing, removing metal from said blank to provide a slot extending forwardly from said deformed area, stamping said gathered area to form the headlight housing to substantially final form at the same time drawing the walls of said slot together, and securing the walls of said slot together in abutting relation.

6. The method of forming a vehicle fender and headlight housing from an integral sheet metal blank which includes gathering a portion oi said blank to provide excess metal for the headlight housing, stamping the body portion of the tender to substantially final form, forming a slot in said fender between the gathered portion thereof and the front portion thereof to remove metal from the front portion of said fender. stamping the gathered portion of said blank to form a headlight housing at the same time drawing the edges of said slot into overlapping relation, securing said edges in overlapping relation.

7. The method of forming a vehicle tender and headlight housing from an integral sheet metal blank which includes gathering a portion of said blank to provide excess metal for the headlight housing, stamping the body portion of said fender to substantially final form, removing a strip of metal to provide a slot extending from the gathered area to the front of said fender, stamping the gathered portion of said blank to form a headlight housing and at the same time drawing the edges 0! said slot into abutting relation, and

securing the edges 01' said slot in abutting relation to provide the front portion of said lender.

8. The method oi forming a vehicle lender and headlight housing from an integral sheet metal blank which includes gathering a portion of said blank to provide excess metal for the headlight housing, gripping said gathered portion to retain the same in predetermined condition during a subsequent operation, stamping the fender to form and subsequently stamping the gathered portion of the blank to provide a headlight housing.

9. The method of forming a vehicle fender and headlight housing from an integral sheet metal blank which includes gathering a portion of said blank to provide excess metal for the headlight housing, gripping said gathered portion to retain the same in predetermined condition during a subsequent operation, stamping the fender to form, forming the gathered portion of said blank to provide the headlight housing and punching a frontal opening therein.

10. The method of forming a vehicle lender and head lamp housing from an integral sheet metal blank which includes gathering a portion of said blank to provide excess metal for the headlight housing. ripping said gathered portion to retain the same in predetermined condition during a subsequent operation, stamping the body portion oi the fender to final form, retaining the body portion of the tender in substantially final form and simultaneously forming the gathered portion of said blank to provide the headlight housing.

JAMES VEHKO.

CERTIFICATE OF CORRECTION.

Patent No 2,166,226.

July 18, 939- JAMES VEHKO.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction aafollowsr Page i first column, line 7 claim 5, for the Word "deformed" read gathered; and that the said Letters Patent should be' read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day 01 September, A. D. 1939.